#include <stdio.h>
#include <unistd.h>

int main(int argc, char *argv[]) {
            if (argc != 2) {
                            fprintf(stderr, "Usage: %s <microseconds>\n", argv[0]);
                                    return 1;
                                        }

                long ms = atol(argv[1]);
                    usleep(ms);

                        return 0;
}
